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Drosophila lethal of scute蛋白的基本螺旋环螺旋域足以进行前神经功能,并激活神经性基因

U Hinz¹, B Giebel, J A Campos-Ortega

¹Institut für Entwicklungsbiologie, Universität zu Köln, Federal Republic of Germany.

|January 14, 1994

概括

甲状腺-急性复合体 (AS-C) 基因调节多虫感官器官的发育. 宫外表达显示功能冗余和bHLH域.

科学领域:

发育生物学是发展生物学.
遗传学是一个遗传学.
神经科学是一个神经科学.

背景情况:

草虫的阿切特-急性复合体 (AS-C) 对于表皮感官器官的发育至关重要.
AS-C 基因编码基本螺旋环螺旋 (bHLH) 转录调节器.
这些基因在形象盘中定义了前神经集群,通过横向抑制启动感官器官发育.

研究的目的:

为了研究AS-C基因家族内的功能冗余.
探索AS-C基因异胎表达在感官器官发育中的作用.
确定AS-C蛋白质对于它们的脑前神经功能所必不可少的领域.

主要方法:

在Drosophila中利用AS-C基因"致命的"的宫外表达.
分析了神经性基因的激活,以应对异胎性脑前神经元集群.
评估了bHLH域对前神经活动的必要性和充分性.

主要成果:

胎外表达"致命的scute"促进了感官器官的发展,独立于其他AS-C基因,显示功能冗余.
神经性基因被激活在外宫前神经元中,促进了表皮原生细胞的发育.
确定了bHLH域是必要的和足够的,可以调解前神经神经功能,神经性基因激活和侧面抑制.

结论:

AS-C在其成员中表现出显著的功能冗余.
bHLH域是AS-C基因在调节神经发生和横向抑制方面的关键功能单元.
这项研究提供了对Drosophila感官器官模式的复杂遗传控制的见解.

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